3.51 Ct. Ruby from Mozambique

This Mozambique ruby presents as a transparent, oval shaped gem weighing 3.51 carats, with calibrated dimensions of 9.03 by 7.86 by 5.66 millimeters and an overall depth of approximately 67 percent based on average diameter. The stone is fashioned in a mixed brilliant cut, combining a brilliant-style crown with pavilion faceting optimized to balance color saturation and light return. The mixed treatment concentrates smaller triangular and kite facets on the crown to enhance scintillation, while the pavilion employs broader, more planar facets to preserve the pinkish red hue through controlled light leakage and internal reflection. Clarity is graded slightly included at the eye level, indicating visible natural features that do not materially disrupt the optical performance, and the polish is described as excellent, yielding crisp facet junctions and minimal surface diffusion of light. Heat treatment has been applied, a standard and stable enhancement for Mozambican corundum that improves hue uniformity and reduces the visual impact of internal features, while origin is documented as Mozambique, known for producing vividly saturated rubies with pinkish undertones. The Natural Ruby Company presents this specimen as a well-proportioned, high-saturation example suited to fine jewelry where color and controlled brilliance are primary objectives.

In comparative optical terms this ruby exhibits the characteristic corundum refractive behavior, with a relatively high refractive index that produces a more adamantine to subadamantine luster than most spinel and many garnet varieties. Corundum s RI near 1.762 to 1.770 and low birefringence contribute to concentrated light return and strong color saturation with modest dispersion, so the perceived brilliance emphasizes intense red transmission and scintillation rather than pronounced spectral fire. Compared with blue sapphires of similar cut and origin, rubies of this vivid intensity tend to appear brighter in mixed lighting because chromium chromophores produce strong selective absorption and frequently contribute fluorescence under longwave light, enhancing the apparent red tone and face-up brightness. Compared with spinel, which has a slightly lower RI and often delivers a more open, lively sparkle but less depth of color, this ruby maintains deeper body color and a denser, more saturated face-up appearance. Relative to diamond, corundum yields less fire due to lower dispersion, yet its reflective qualities are prized for sustained, saturated color and robust light return in red wavelengths. For clients who prioritize vivid color with excellent polish and a cut engineered to maximize both scintillation and color retention, this Mozambique oval from The Natural Ruby Company offers a technically refined balance of optical performance and natural character.